iHeartRadio is going to play Pharrell Williams's worldwide smash 'Happy' on a loop. For 13 days.
The stunt, which is being used to promote the United Nations Foundation's International Day of Happiness, has already started and will conclude on March 31.
The Pharrell stunt is a step up from San Francisco's 105.7, who recently tormented treated listeners to Nelly's classic pop hit 'Hot In Herre' for three days in a row.